Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Pierce, CO, based on the USDA Hardiness Zone 5a.
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Pierce, CO Frost Dates & Growing Season
Last Spring Frost Date for Pierce, CO
The average last frost date in spring for Pierce is May 10th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until May 24th before moving plants outdoors. Waiting these extra few weeks significantly reduces the risk of a late freeze damaging young transplants.
First Fall Frost Date for Pierce, CO
The average first frost date in fall for Pierce is October 1st. This date marks the approximate end of the growing season for tender plants. Gardeners should plan to harvest frost-sensitive vegetables or provide heavy protection (such as row covers) before this date to avoid crop loss.
Growing Season Length in Pierce, CO
Based on historical frost data, the estimated growing season length in Pierce is approximately 144 days. This duration determines which vegetable varieties have enough time to reach maturity before the winter cold sets in. Short-season varieties are recommended for crops that require a longer warm period.
Please note: These dates are climatological averages. Actual weather conditions vary by year. Always check the local 10-day forecast before planting.
Pierce, CO Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Pierce, CO Monthly Planting Recommendations
March
In March, recommended activities include direct sowing Spinach (from March 29th to April 12th), starting Black Eyed Susan seeds indoors (from March 15th to March 29th), and starting Tomato seeds indoors (from March 15th to March 29th).
April
In April, recommended activities include direct sowing Flax (from April 12th to April 26th), direct sowing Mustard (from April 12th to April 26th), and direct sowing Kale (from April 12th to April 26th).
May
In May, recommended activities include direct sowing Fenugreek (from May 10th to May 24th), direct sowing Chia (from May 24th to June 7th), and direct sowing Zinnia (from May 17th to May 31st).